Dominic Breazeale (20-1) was handed his only ever professional career loss by Anthony Joshua (22-0) in June 2016, so knows first-hand just how talented the unified world heavyweight champion is.
The 33-year-old Californian was dropped twice by the Londoner and finally halted in the seventh-round of their 12-round IBF world heavyweight championship contest at the O2 Arena in London.
The former college quarterback next challenges Deontay Wilder (40-0-1) for the WBC belt on May 18 at the Barclays Center in Brooklyn, whilst Joshua defends his WBA 'Super', IBF, WBO and IBO titles to Jarrell Miller (23-0-1) on June 1 at MSG.
Ahead of his second world title tilt, he came out with the following insights, "Joshua's 10 times better than Wilder.
"He's just well-rounded, mentally, physically, athletic, boxing skill-wise, and he's progressing."
He continued to heap praise upon his conqueror, "You could see in his earlier fights he kind of did some things wrong and he's kind of made those corrections. He's got punching power in both hands. He puts guys down with the right hand and with the left hook."
He then turned to his forthcoming opponent with a far different view, "Wilder, on the hand, he slaps people to death. It's like, yeah, in boxing it's the shots you don't see coming. But that shot he throws, man, it's from way back here, like he's reaching for some whipped cream."